Diagnostic, Audit & Adjustment Menu System 3-8
Yellow, Magenta, Cyan.) Set controls as follows: 1. Adjust BRIGHTNESS and CONTRAST to minimum. 2.
Turn up BRIGHTNESS until the pixels in the black stripe begin to glow (turn dark gray). 3. Bring up the
CONTRAST control until you can see 15 bars. Then increase the contrast until you can’t distinguish a
difference between the top two bars.
Crosshatch Patterns
consist of an on-screen grid and a series of dots. Crosshatch Patterns help you to
check or adjust several monitor parameters: These parameters include convergence, linearity, active
viewing area and dynamic focus. The grid and the dots should be all white in color, with no fringes or
parallel images. The lines should be straight and the dots round. For more detail on these adjustments,
consult service literature from the monitor manufacturer.
Color Screen
tests fill the screen with 100% of the chosen color at normal intensity. The Color Screen
tests help you to check or adjust monitor intensity, black level, blanking and color purity. Each screen
should be absolutely uniform from top to bottom and side to side. No retrace lines or noise should be
visible. Color Screens may not hold their uniformity if the monitor degaussing circuit is defective.
If tests indicate a need for adjustment, use controls on the Monitor Remote Adjustment Board. You can
make other adjustments from the back of the monitor.
White, Gray, and Black Screens
fill the screen with black, gray or white at various intensities. These
monochrome screens help you to check or adjust monitor convergence, purity, contrast and intensity.
These screens also simplify black level and color gun control settings. The screens should be uniform with
no color tints or distortion. No retrace lines or noise should be visible.
If tests indicate a need for adjustment, use controls on the Monitor Remote Adjustment Board.
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